Re: query

Andrew Bacdayan (bacdayan@ALPHA.NSULA.EDU)
Fri, 02 Apr 1999 10:53:46 -0600

I like Dr. Davies's explanation because that is what I have been using in
my classes. In addition, I always make the point that the law of demand is
only a component of the broader law of supply and demand. While the law of
demand states that quantify is a function of price, the law of supply and
demand states that price is a function of supply and demand. Thus, drawing
the demand curve with P on the vertical axis is simply the initial step in
the construction of the supply-demand model.

P.S. Last time I posted on this message board, my pc was infested by the
HAPPY.EXE worm. My system has now been dewormed and I apologize to the
group for the inconvenience.

Andrew W. Bacdayan, Ph.D.
College of Business
Northwestern State University
Natchitoches, LA 71497

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From: Anthony Davies <adavies@altavista.net>
To: Teach Econ Discussion List <tch-econ@numen.elon.edu>
Subject: Re: query
Date: Friday, April 02, 1999 9:52 AM

We think of quantity demanded and quantity supplied as being functions of
price because we tend to think in terms of individual behavior (i.e.: how
many units am I willing to buy when the price is $2). In modeling
equilibria, we think not in terms of individual, but group behavior (i.e.:
if the group is looking to consume 100 units but only produce 80,
competition among the consumers for a limited quantity of product will be
manifest in an increase in price). Thus, it seems to make sense to think of
quantity as a function of price from the perspective of the individual, but
price as a function of quantity from the perspective of the market as a
whole.

Anthony Davies
Visiting Professor
Division of Economics and Finance
West Virginia University
Morgantown, WV 26505